<?php
    namespace app\index\model;
    use think\Model;
    
    class Book extends Model
    {
        protected $type = [
            'publish_time' => 'timestamp:Y-m-d',
        ];       

        // 开启自动写入时间戳
        protected $autoWriteTimestamp = true;

        // 定义自动完成的属性
        protected $insert = ['status'=>1];

    }
?>